title: Brief report: a 48XXXY/49XXXXY male with expressive speech defect.
authors.affiliation: Frith Hospital, Leicester.
authors.forename: R A
authors.initials: RA
authors.lastname: Collacott
authors.forename: C
authors.initials: C
authors.lastname: Mitchell
authors.forename: L
authors.initials: L
authors.lastname: Dawes-Gamble
authors.forename: I D
authors.initials: ID
authors.lastname: Young
authors.forename: D
authors.initials: D
authors.lastname: Duckett
mesh_terms: D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D001321:Autistic Disorder / Q000175:diagnosis / Q000235:genetics* / Q000523:psychology; D002648:Child; D005500:Follow-Up Studies; D006801:Humans; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000175:diagnosis / Q000235:genetics* / Q000523:psychology; D007805:Language Development Disorders / Q000175:diagnosis / Q000235:genetics / Q000523:psychology; D008297:Male; D012919:Social Behavior; D014888:Wechsler Scales